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Preparation of ceria-gadolinia electrolytes by the tape rolling technique

Published online by Cambridge University Press:  31 January 2011

Necati Özkan  and
Brian J. Briscoe
Necati Özkan
Affiliation:
The Particle Technology Group, Department of Chemical Engineering, Imperial College of Science, Technology, and Medicine, London, SW7 2BY, United Kingdom
Brian J. Briscoe
Affiliation:
The Particle Technology Group, Department of Chemical Engineering, Imperial College of Science, Technology, and Medicine, London, SW7 2BY, United Kingdom
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Abstract

The preparation of thin (ca. 200 μm) Ce0.9Gd0.1O1.95 planar electrolytes using the tape rolling technique is described. The processing and formation of these electrolytes involved several steps: (i) the production of a processable ceramic paste, (ii) rolling and cutting, (iii) binder burnout, and (iv) sintering. The rheology of these ceramic pastes is characterized by a hardness indentation test. The materials parameters which may be obtained from the hardness indentation test such as the hardness (plastic flow stress), elastic modulus, and plasticity index are provided. The rheology, as characterized by the hardness method, of the pastes is shown to be influenced by the nature and extent of processing aids and also the mixing and milling times. Further, it is shown that by using a paste formulation with appropriate rheological properties, it is possible to produce uniform thin green tapes using a twin roll mill. The binder burnout characteristics of the ceramic pastes were studied by using a specially constructed thermal gravimetric apparatus. It is shown that the heating rate and the ambient atmosphere have strong influences upon the binder burnout kinetics of these green tapes. Finally, it is shown that sintered Ce0.9Gd0.1O1.9 electrolytes, with a near theoretical density and with a uniform microstructure as well as a chosen near net shape, may be prepared from the corresponding tape rolled greens.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 3 , March 1998 , pp. 665 - 674
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1.Minh, N. Q., J. Am. Ceram. Soc. 76 (3), 463–588 (1993).Google Scholar
2.Myles, K. M., Proc. 2nd Int. Symp. on Solid Oxide Fuel Cells, edited by Grosz, F., Zegers, P., Singhal, S. C., and Yamamoto, O., 2–5 July 1991, Athens, Greece, p.85.Google Scholar
3.Minh, N. Q., Armstrong, T. R., Esopa, J. R., and Guiheen, J. V., Proc. 2nd Int. Symp. on Solid Oxide Fuel Cells, edited by Grosz, F., Zegers, P., Singhal, S. C., and Yammamoto, O., 2–5 July 1991, Athens, Greece, p. 93.Google Scholar
4.Takagi, H., Kobayashi, S., Shiratori, A., Nishida, K., and Sakabe, Y., Proc. 2nd Int. Symp. on Solid Oxide Fuel Cells, edited by Grosz, F., Zegers, P., Singhal, S. C., and Yamamoto, O., 2–5 July 1991, Athens, Greece, p. 99.Google Scholar
5.Steele, B. C. H., Proc. 1st European Solid Oxide Fuel Cell Forum, 3–7 October 1994, Lucerne, Switzerland, Vol. 1, p. 375.Google Scholar
6.Minh, N. Q., Armstrong, T. R., Esopa, J. R., Guiheen, J. V., Horne, C. R., and van Ackeren, J. J., Proc. 3rd Symp. on Solid Oxide Fuel Cells, 1993, Honolulu, Hawaii, p. 801.Google Scholar
7.Minh, N. Q., Horne, C. R., Liu, F., Staszak, P. R., Stillwagon, T. L., and van Acteren, J. J., in Proc. 1st Int. Symp. on Solid Oxide Fuel Cells, edited by Singhal, S. C. (The Electrochemical Society, Pennington, NJ, 1989), p. 307.Google Scholar
8.Briscoe, B. J. and Özkan, N., J. Euro. Ceram. Soc. (in press).Google Scholar
9.Tabor, D., Hardness of Metals (Oxford University Press, U.K., 1951).Google Scholar
10.Kendall, K. and Tabor, D., Proc. R. Soc. London A 323, 321–340 (1971).Google Scholar
11.Pharr, G. M., Oliver, W. C., and Brotzen, F. R., J. Mater. Res. 7, 613–617 (1992).CrossRefGoogle Scholar
12.Johnson, K. L., Contact Mechanics (Cambridge Press, Cambridge, 1985).CrossRefGoogle Scholar
13.Briscoe, B. J. and Sebastian, S., Proc. Soc. London 452, 439 (1996).Google Scholar
14.Box, G. E. P. and Cox, D. R., Roy, J., Statistical Soc. 26, 211–243 (1964).Google Scholar
15.Masia, S., Calvert, P. D., Rhine, W. E., and Bowen, H. K., J. Mater. Sci. 24, 1907 (1989).Google Scholar
16.Shih, W-K., Sacks, M. D., Scheiffele, G. W., Sun, Y. N., and Williams, J. W., Ceram. Trans. Ceram. Pow. Sci. II-A, edited by Messing, G., Fuller, E. R. Jr, and Hausner, H. 1, 549 (1988).Google Scholar
17.Scheiffele, G. W. and Sacks, M. D., Ceram. Trans. Ceram. Powd. Sci. II-A, edited by Messing, G., Fuller, E. R. Jr, and Hausner, H., 1, 559 (1988).Google Scholar
18.Özkan, N. and Briscoe, B. J., unpublished data.Google Scholar
19.Bocaccini, A. R., Trusty, P. A., and Taplin, D. M. R., Mater. Lett. 24, 199 (1995).Google Scholar
20.Özkan, N. and Briscoe, B. J., J. Eur. Ceram. Soc. 14, 143 (1994).CrossRefGoogle Scholar
21.Özkan, N. and Briscoe, B. J., Ceram. Int. (in press).Google Scholar